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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-23 18:30 |
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Conference: Bucharest University Faculty of Physics 2022 Meeting
Section: Nuclear and Elementary Particles Physics
Title:
Anisotropic flow of identified particles in Xe–Xe collisions at √s_NN = 5.44 TeV
Authors:
Mihaela Gabriela BESOIU (1,2)
*
Affiliation:
1) Faculty of Physics, University of Bucharest, Magurele, Ilfov, Romania
2) Institute of Space Science, Magurele, Ilfov, Romania
E-mail
besoiugabriela@gmail.com
Keywords:
heavy-ion collisions, anisotropic flow, flow coefficients
Abstract:
Heavy-ion collisions produce asymmetric pressure gradients which convert the initial spatial asymmetry into an anisotropy in final state momentum space via multiple interactions, a phenomenon referred to as anisotropic flow. The magnitude of anisotropic flow is characterized using the harmonic coefficients v_n in a Fourier decomposition of the azimuthal distribution of produced particles relative to the symmetry plane in a collision. In this talk we present the elliptic and triangular flow coefficients of identified particles (π^±, K^± and p+͞p) measured in Xe-Xe collisions at √s_NN = 5.44 TeV recorded by the ALICE detector. The results obtained using the scalar product method are reported as a function of transverse momentum, p_T, within the rapidity range |y|<0.5 for various centrality classes. The flow coefficients exhibit a particle mass dependence for p_T < 3 GeV/c and type grouping (i.e., mesons and baryons) at intermediate transverse momenta (3 < p_T < 8 GeV/c). The centrality dependence of the shape evolution of the p_T- differential v_2 is also shown for various particles.
References:
[1] S. A. Voloshin, A. M. Poskanzer and R. Snellings, in Landolt-Boernstein, Relativistic Heavy Ion Physics, Vol. 1/23, p 5-54 (Springer-Verlag, 2010)
[2] S. Voloshin and Y. Zhang, Z. Phys. C 70 665 (1996)
[3] A. M. Poskanzer and S. A. Voloshin Phys. Rev. C 58 1671 (1998)
[4] S. Acharya et al. [ALICE Collaboration], Phys. Lett. B 784, 82 (2018)
[5] S. Acharya et al. [ALICE Collaboration], JHEP 10, 152 (2021)
Acknowledgement:
ALICE Collaboration
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